# AD8418AWHRMZ

**Analog Devices** · Operational Amplifier · MSOP-8

AD8418AWHRMZ from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | −IN | input | Negative input of the shunt amplifier; common-mode range −2 V to +70 V continuous, −3 V to +80 V survival. |
| 2 | GND | power_in | Ground. |
| 3 | VREF2 | input | Reference input 2, tied through an internal 100 kΩ resistor to the offset node; operating range is GND to VS and it is functionally identical to VREF1. |
| 4 | NC | unconnected | No connect; do not connect to this pin. |
| 5 | OUT | output | Buffered output with fixed gain of 20 V/V, output range 0.032 V to VS − 0.032 V at RL = 25 kΩ, up to 500 pF capacitive load. |
| 6 | VS | power_in | Supply voltage, 2.7 V to 5.5 V operating range (6 V absolute maximum). |
| 7 | VREF1 | input | Reference input 1, tied through an internal 100 kΩ resistor to the offset node; operating range is GND to VS and it is functionally identical to VREF2. |
| 8 | +IN | input | Positive input of the shunt amplifier; common-mode range −2 V to +70 V continuous, −3 V to +80 V survival. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Amplifiers |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Gain Error Over Temperature |  | -0.15 |  | 0.15 | % | Specified temperature range | 3 |
| Gain vs. Temperature |  | -5 |  | 5 | ppm/°C |  | 3 |
| Offset Voltage, RTI |  | -100 |  | 100 | μV | 25°C | 3 |
| Offset Voltage Over Temperature, RTI |  | -200 |  | 200 | μV | Specified temperature range | 3 |
| Offset Drift |  | -0.4 | 0.1 | 0.4 | μV/°C |  | 3 |
| Input Voltage Range |  | -2 |  | 70 | V | Common mode, continuous | 3 |
| Common-Mode Rejection Ratio | CMRR | 90 | 100 |  | dB | Specified temperature range, f = dc | 3 |
| Output Voltage Range (low) |  | 0.032 |  |  | V | RL = 25 kΩ; upper limit is VS − 0.032 V | 3 |
| Maximum Capacitive Load |  | 0 |  | 500 | pF | No continuous oscillation | 3 |
| Ratiometric Accuracy |  | 0.4985 |  | 0.5015 | V/V | Divider to supplies | 3 |
| Accuracy, Referred to the Output (RTO) |  | -1 |  | 1 | mV/V | Voltage applied to VREF1 and VREF2 in parallel | 3 |
| Output Offset Adjustment Range (low) |  | 0.032 |  |  | V | VS = 5 V; upper limit is VS − 0.032 V | 3 |
| Power Supply Operating Range | VS | 2.7 |  | 5.5 | V |  | 3 |
| Quiescent Current Over Temperature | IQ |  |  | 4.2 | mA | VOUT = 0.1 V dc, AD8418AWH | 3 |
| Operating Temperature Range (specified performance) |  | -40 |  | 150 | °C | AD8418AWH | 3 |
| Supply Voltage |  |  |  | 6 | V |  | 4 |
| Input Voltage Range, Common-Mode |  | -3 |  | 80 | V |  | 4 |
| Input Voltage Range, Differential |  |  |  | 5.5 | V | Magnitude | 4 |
| Reverse Supply Voltage |  |  |  | 0.3 | V |  | 4 |
| ESD Human Body Model | HBM | -2000 |  | 2000 | V |  | 4 |
| Operating Temperature Range (absolute maximum) |  | -40 |  | 150 | °C | AD8418AWH | 4 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 4 |
| Thermal Resistance, MSOP Package | θJA |  | 134.5 |  | °C/W | MSOP package | 4 |
| Gain, Initial |  |  | 20 |  | V/V |  | 3 |
| Output Resistance |  |  | 2 |  | Ω |  | 3 |
| Small Signal -3 dB Bandwidth |  |  | 250 |  | kHz |  | 3 |
| Slew Rate |  |  | 1 |  | V/μs |  | 3 |
| Noise, 0.1 Hz to 10 Hz (RTI) |  |  | 2.3 |  | μV p-p |  | 3 |
| Spectral Density, RTI |  |  | 110 |  | nV/√Hz | 1 kHz | 3 |

## CAD (KiCad official)

- Symbol: `AD8418AWHRMZ`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ad8418awhrmz-etched.step` / `ad8418awhrmz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad8418awhrmz.step` / `ad8418awhrmz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8418A.pdf) (18 pp, sha256 `fa9de72163c75771`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ad8418awhrmz-datasheet.pdf)